Justin Bieber's Comedy Central roast filmed

Comedian Kevin Hart, who acted as Roast Master at the event which taped over the weekend in Los Angeles, opened up to Jimmy Kimmel about how rough some of the comedian's jokes were to the young pop star.

"It went a little rough. I'm not gonna lie," Hart said. "There was some moments where [I thought] 'Justin's gonna cry in the car'."

Comedian Jeff Ross called the 21-year-old singer "the King Joffrey of pop."

Comedic actor Chris D'Elia pointed out, "You literally are a guy who has it all-except for respect, love, friends, good parents, and a Grammy."

Saturday Night Live newbie Pete Davidson told Bieber, "You're the worst thing that Usher has done to America, since the guy who sat John Wilkes Booth behind Abraham Lincoln."

According to Hart, the roast was a good place for Bieber to address his crazy antics over the past year and move forward with his career.

"It got a little rough. But I will say this I will say at the end of it, what I love the most and I will say this here, Justin Bieber stood on stage and he gave his rebuttal," he said. "And, at the end of it, it was more about him acknowledging all of the stuff that he's done, saying that he's now in a different place of life [and] he's ready to mature and move on."